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Key.cpp
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Key.cpp
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/*
* Copyright (c) (2023) SPHINX_ORG
* Authors:
* - (C kusuma) <[email protected]>
* GitHub: (https://github.com/chykusuma)
* Contributors:
* - (Contributor 1) <[email protected]>
* Github: (https://github.com/yourgit)
* - (Contributor 2) <[email protected]>
* Github: (https://github.com/yourgit)
*/
/////////////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////////////
// This code is a part of the SPHINXKey namespace, which provides functions related to the SPHINX (Sphinx-Hybrid Key) cryptographic scheme. The main functionalities include generating SPHINX key pairs, extracting SPHINX public and private keys from a hybrid key pair, calculating the SPHINX public key from the private key, and generating a smart contract address based on the SPHINX public key and a contract name. Let's break down the code and explain each part in detail:
// Type Aliases and Constants:
// The code defines two type aliases SPHINXPubKey and SPHINXPrivKey to represent SPHINX public and private keys, respectively. Additionally, it defines a constant SPHINX_PUBLIC_KEY_LENGTH which is the size of the SPHINX public key, calculated as the sum of the Kyber768 public key size and the X448 public key size.
// calculatePublicKey Function:
// This function takes the SPHINX private key as input and calculates the corresponding SPHINX public key. It creates a vector of bytes to store the public key, then calls a hypothetical function calculate_sphinx_public_key, which is assumed to be available externally to calculate the public key. The function returns the computed public key as a vector.
// extractSPHINXPublicKey and extractSPHINXPrivateKey Functions:
// These functions are used to extract the SPHINX public and private keys, respectively, from a hybrid key pair (HybridKeypair struct). They simply return the corresponding components from the merged_key member of the HybridKeypair structure.
// generateAddress Function:
// This function generates a smart contract address based on the SPHINX public key and a contract name. It uses the SPHINXHash::SPHINX_256 function (assumed to be available) to hash the SPHINX public key. The function then concatenates the contract name and the hashed public key to create a contract identifier. Finally, the function returns the contract identifier as the smart contract address.
// printKeyPair Lambda Function:
// This lambda function is defined inside the generateAddress function. It takes a hybrid key pair as input and prints the merged public key and the smart contract address generated from that public key using the generateAddress function.
// generate_hybrid_keypair Function:
// This function calls the SPHINXHybridKey::generate_hybrid_keypair function from the SPHINXHybridKey namespace (assumed to be available externally). It generates a hybrid key pair using the Kyber768, X25519, and PKE schemes. Then, it returns the generated hybrid key pair.
// The SPHINXKey namespace provides a set of utility functions to work with the SPHINX cryptographic scheme and interacts with other functions available in the SPHINXHybridKey namespace to generate a hybrid key pair and perform key exchange and encryption operations using the Kyber1024, X448, and PKE schemes.
////////////////////////////////////////////////////////////////////////////////////////////////////////
#include <iostream>
#include <string>
#include "Hybrid_key.hpp"
#include "Hash.hpp"
namespace SPHINXKey {
// Define an alias for the merged public key as SPHINXPubKey
using SPHINXPubKey = std::vector<unsigned char>;
// Define an alias for the merged private key as SPHINXPrivKey
using SPHINXPrivKey = std::vector<unsigned char>;
// Define value of SPHINXPubKey length
constexpr size_t SPHINX_PUBLIC_KEY_LENGTH = KYBER768_PUBLIC_KEY_LENGTH + CURVE25519_PUBLIC_KEY_SIZE;
// Function to calculate the SPHINX public key from the private key
SPHINXPubKey calculatePublicKey(const SPHINXPrivKey& privateKey) {
SPHINXPubKey publicKey(SPHINX_PUBLIC_KEY_LENGTH);
// Assuming the appropriate function for calculating SPHINX public key is available
calculate_sphinx_public_key(publicKey.data(), privateKey.data());
return publicKey;
}
// Function to extract the SPHINX public key from the hybrid keypair
SPHINXPubKey extractSPHINXPublicKey(const HybridKeypair& hybridKeyPair) {
return hybridKeyPair.merged_key.kyber_public_key;
}
// Function to extract the SPHINX private key from the hybrid keypair
SPHINXPrivKey extractSPHINXPrivateKey(const HybridKeypair& hybridKeyPair) {
return hybridKeyPair.merged_key.kyber_private_key;
}
// Function to generate the smart contract address based on the public key and contract name
std::string generateAddress(const std::string& publicKey, const std::string& contractName) {
// Assume the definition of SPHINXHash::SPHINX_256 function
std::string hash = SPHINXHash::SPHINX_256(publicKey);
std::string contractIdentifier = contractName + "_" + hash;
std::string address = contractIdentifier;
// Function to print the key pair information
auto printKeyPair = [](const HybridKeypair& hybridKeyPair) {
// Extract the public key from the merged key pair
SPHINXPubKey pubKey = hybridKeyPair.merged_key.kyber_public_key;
std::string mergedPublicKey(reinterpret_cast<const char*>(pubKey.data()), pubKey.size());
// Print the merged public key and address
std::cout << "Merged Public key: " << mergedPublicKey << std::endl;
std::cout << "Address: " << generateAddress(mergedPublicKey, "MyContract") << std::endl;
};
// Call the original function from "hybrid_key.cpp"
HybridKeypair hybrid_keypair = SPHINXHybridKey::generate_hybrid_keypair();
// Call the printKeyPair function to print the merged public key and address
printKeyPair(hybrid_keypair);
return address;
}
// Function to generate the hybrid keypair using functions from "hybrid_key.cpp"
HybridKeypair generate_hybrid_keypair() {
// Forward declaration of HybridKeypair struct (if required)
struct HybridKeypair;
// Call the original function from "hybrid_key.cpp"
HybridKeypair hybrid_keypair = SPHINXHybridKey::generate_hybrid_keypair();
return hybrid_keypair;
}
} // namespace SPHINXKey